When Ali was drafted into the Vietnam War at the height of his boxing career, his claim to conscientious objector status led to a controversial legal battle that rattled the U.S. judicial system right up to the highest court in the land.

The film stars Frank Langella, Christopher Plummer, Danny Glover and others. Ali will appear in archived footage. It’s directed by Stephen Frears, who also directed The Queen and High Fidelity.